nm-lldp-listener.c 17.3 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Copyright (C) 2015 Red Hat, Inc.
 */

#include "config.h"

#include <net/ethernet.h>

#include "sd-lldp.h"
#include "lldp.h"
#include "nm-lldp-listener.h"
#include "nm-platform.h"
#include "nm-utils.h"

#define MAX_NEIGHBORS         4096
#define MIN_UPDATE_INTERVAL   2

typedef struct {
	char         *iface;
	int           ifindex;
	sd_lldp      *lldp_handle;
	GHashTable   *lldp_neighbors;
	guint         timer;
	guint         num_pending_events;
	GVariant     *variant;
} NMLldpListenerPrivate;

enum {
	PROP_0,
	PROP_NEIGHBORS,

	LAST_PROP
};

G_DEFINE_TYPE (NMLldpListener, nm_lldp_listener, G_TYPE_OBJECT)

#define NM_LLDP_LISTENER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_LLDP_LISTENER, NMLldpListenerPrivate))

typedef struct {
	guint8 chassis_id_type;
	guint8 port_id_type;
	char *chassis_id;
	char *port_id;

	int dest;

	GHashTable *tlvs;
} LLDPNeighbor;

static void process_lldp_neighbors (NMLldpListener *self);

static void
gvalue_destroy (gpointer data)
{
	GValue *value = (GValue *) data;

	g_value_unset (value);
	g_slice_free (GValue, value);
}

static GValue *
gvalue_new_nstr (const char *str, guint16 len)
{
	GValue *value;

	value = g_slice_new0 (GValue);
	g_value_init (value, G_TYPE_STRING);
	g_value_take_string (value, strndup (str, len));
	return value;
}

static GValue *
gvalue_new_uint (guint val)
{
	GValue *value;

	value = g_slice_new0 (GValue);
	g_value_init (value, G_TYPE_UINT);
	g_value_set_uint (value, val);
	return value;
}

static guint
lldp_neighbor_id_hash (gconstpointer ptr)
{
	const LLDPNeighbor *neigh = ptr;

	return g_str_hash (neigh->chassis_id) ^
	       g_str_hash (neigh->port_id) ^
	       neigh->chassis_id_type ^
	       (neigh->port_id_type * 33);
}

static gboolean
lldp_neighbor_id_equal (gconstpointer a, gconstpointer b)
{
	const LLDPNeighbor *x = a, *y = b;

	return x->chassis_id_type == y->chassis_id_type &&
	       x->port_id_type == y->port_id_type &&
	       !g_strcmp0 (x->chassis_id, y->chassis_id) &&
	       !g_strcmp0 (x->port_id, y->port_id);
}

static void
lldp_neighbor_free (gpointer data)
{
	LLDPNeighbor *neighbor = data;

	if (neighbor) {
		g_free (neighbor->chassis_id);
		g_free (neighbor->port_id);
		g_hash_table_unref (neighbor->tlvs);
		g_free (neighbor);
	}
}

static gboolean
lldp_neighbor_equal (LLDPNeighbor *a, LLDPNeighbor *b)
{
	GHashTableIter iter;
	gpointer k, v;

	g_return_val_if_fail (a && a->tlvs, FALSE);
	g_return_val_if_fail (b && b->tlvs, FALSE);

	if (   a->chassis_id_type != b->chassis_id_type
	    || a->port_id_type != b->port_id_type
	    || a->dest != b->dest
	    || g_strcmp0 (a->chassis_id, b->chassis_id)
	    || g_strcmp0 (a->port_id, b->port_id))
		return FALSE;

	if (g_hash_table_size (a->tlvs) != g_hash_table_size (b->tlvs))
		return FALSE;

	g_hash_table_iter_init (&iter, a->tlvs);
	while (g_hash_table_iter_next (&iter, &k, &v)) {
		GValue *value_a, *value_b;

		value_a = v;
		value_b = g_hash_table_lookup (b->tlvs, k);

		if (!value_b)
			return FALSE;

		g_return_val_if_fail (G_VALUE_TYPE (value_a) == G_VALUE_TYPE (value_b), FALSE);

		if (G_VALUE_HOLDS_STRING (value_a)) {
			if (g_strcmp0 (g_value_get_string (value_a), g_value_get_string (value_b)))
				return FALSE;
		} else if (G_VALUE_HOLDS_UINT (value_a)) {
			if (g_value_get_uint (value_a) != g_value_get_uint (value_b))
				return FALSE;
		} else
			g_return_val_if_reached (FALSE);
	}

	return TRUE;
}

static gboolean
lldp_hash_table_equal (GHashTable *a, GHashTable *b)
{
	GHashTableIter iter;
	gpointer val;

	g_return_val_if_fail (a, FALSE);
	g_return_val_if_fail (b, FALSE);

	if (g_hash_table_size (a) != g_hash_table_size (b))
		return FALSE;

	g_hash_table_iter_init (&iter, a);
	while (g_hash_table_iter_next (&iter, NULL, &val)) {
		LLDPNeighbor *neigh_a, *neigh_b;

		neigh_a = val;
		neigh_b = g_hash_table_lookup (b, val);

		if (!neigh_b)
			return FALSE;

		if (!lldp_neighbor_equal (neigh_a, neigh_b))
			return FALSE;
	}

	return TRUE;
}

static gboolean
lldp_timeout (gpointer user_data)
{
	NMLldpListener *self = NM_LLDP_LISTENER (user_data);
	NMLldpListenerPrivate *priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	priv->timer = 0;

	if (priv->num_pending_events)
		process_lldp_neighbors (self);

	return G_SOURCE_REMOVE;
}

static void
process_lldp_neighbors (NMLldpListener *self)
{
	NMLldpListenerPrivate *priv = NM_LLDP_LISTENER_GET_PRIVATE (self);
	sd_lldp_packet **packets = NULL;
	GHashTable *hash;
	int num, i;

	num = sd_lldp_get_packets (priv->lldp_handle, &packets);
	if (num < 0) {
		nm_log_dbg (LOGD_DEVICE, "LLDP: error %d retrieving neighbor packets for %s",
		            num, priv->iface);
		return;
	}

	hash = g_hash_table_new_full (lldp_neighbor_id_hash, lldp_neighbor_id_equal,
	                              lldp_neighbor_free, NULL);

	for (i = 0; packets && i < num; i++) {
		uint8_t chassis_id_type, port_id_type, *chassis_id, *port_id, data8;
		uint16_t chassis_id_len, port_id_len, len, data16;
		LLDPNeighbor *neigh;
		GValue *value;
		char *str;
		int r;

		if (i >= MAX_NEIGHBORS)
			goto next_packet;

		r = sd_lldp_packet_read_chassis_id (packets[i], &chassis_id_type,
		                                    &chassis_id, &chassis_id_len);
		if (r < 0)
			goto next_packet;

		r = sd_lldp_packet_read_port_id (packets[i], &port_id_type,
		                                 &port_id, &port_id_len);
		if (r < 0)
			goto next_packet;

		neigh = g_malloc0 (sizeof (LLDPNeighbor));
		neigh->tlvs = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, gvalue_destroy);
		neigh->chassis_id_type = chassis_id_type;
		neigh->port_id_type = port_id_type;
		sd_lldp_packet_get_destination_type (packets[i], &neigh->dest);

		if (chassis_id_len < 1) {
			lldp_neighbor_free (neigh);
			goto next_packet;
		}

		switch (chassis_id_type) {
		case LLDP_CHASSIS_SUBTYPE_INTERFACE_ALIAS:
		case LLDP_CHASSIS_SUBTYPE_INTERFACE_NAME:
		case LLDP_CHASSIS_SUBTYPE_LOCALLY_ASSIGNED:
		case LLDP_CHASSIS_SUBTYPE_CHASSIS_COMPONENT:
			neigh->chassis_id = strndup ((char *) chassis_id, chassis_id_len);
			break;
		case LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS:
			neigh->chassis_id = nm_utils_hwaddr_ntoa (chassis_id, chassis_id_len);
			break;
		default:
			nm_log_dbg (LOGD_DEVICE, "LLDP: unsupported chassis ID type %d", chassis_id_type);
			lldp_neighbor_free (neigh);
			goto next_packet;
		}

		if (port_id_len < 1) {
			lldp_neighbor_free (neigh);
			goto next_packet;
		}

		switch (port_id_type) {
		case LLDP_PORT_SUBTYPE_INTERFACE_ALIAS:
		case LLDP_PORT_SUBTYPE_INTERFACE_NAME:
		case LLDP_PORT_SUBTYPE_LOCALLY_ASSIGNED:
		case LLDP_PORT_SUBTYPE_PORT_COMPONENT:
			neigh->port_id = strndup ((char *) port_id, port_id_len);
			break;
		case LLDP_PORT_SUBTYPE_MAC_ADDRESS:
			neigh->port_id = nm_utils_hwaddr_ntoa (port_id, port_id_len);
			break;
		default:
			nm_log_dbg (LOGD_DEVICE, "LLDP: unsupported port ID type %d", port_id_type);
			lldp_neighbor_free (neigh);
			goto next_packet;
		}

		if (sd_lldp_packet_read_port_description (packets[i], &str, &len) == 0) {
			value = gvalue_new_nstr (str, len);
			g_hash_table_insert (neigh->tlvs, NM_LLDP_ATTR_PORT_DESCRIPTION, value);
		}

		if (sd_lldp_packet_read_system_name (packets[i], &str, &len) == 0) {
			value = gvalue_new_nstr (str, len);
			g_hash_table_insert (neigh->tlvs, NM_LLDP_ATTR_SYSTEM_NAME, value);
		}

		if (sd_lldp_packet_read_system_description (packets[i], &str, &len) == 0) {
			value = gvalue_new_nstr (str, len);
			g_hash_table_insert (neigh->tlvs, NM_LLDP_ATTR_SYSTEM_DESCRIPTION, value);
		}

		if (sd_lldp_packet_read_system_capability (packets[i], &data16) == 0) {
			value = gvalue_new_uint (data16);
			g_hash_table_insert (neigh->tlvs, NM_LLDP_ATTR_SYSTEM_CAPABILITIES, value);
		}

		if (sd_lldp_packet_read_port_vlan_id (packets[i], &data16) == 0) {
			value = gvalue_new_uint (data16);
			g_hash_table_insert (neigh->tlvs, NM_LLDP_ATTR_IEEE_802_1_PVID, value);
		}

		if (sd_lldp_packet_read_port_protocol_vlan_id (packets[i], &data8, &data16) == 0) {
			value = gvalue_new_uint (data16);
			g_hash_table_insert (neigh->tlvs, NM_LLDP_ATTR_IEEE_802_1_PPVID, value);

			value = gvalue_new_uint (data8);
			g_hash_table_insert (neigh->tlvs, NM_LLDP_ATTR_IEEE_802_1_PPVID_FLAGS, value);
		}

		if (sd_lldp_packet_read_vlan_name (packets[i], &data16, &str, &len) == 0) {
			value = gvalue_new_uint (data16);
			g_hash_table_insert (neigh->tlvs, NM_LLDP_ATTR_IEEE_802_1_VID, value);

			value = gvalue_new_nstr (str, len);
			g_hash_table_insert (neigh->tlvs, NM_LLDP_ATTR_IEEE_802_1_VLAN_NAME, value);
		}

		nm_log_dbg (LOGD_DEVICE, "LLDP: new neigh: CHASSIS='%s' PORT='%s'",
		            neigh->chassis_id, neigh->port_id);

		g_hash_table_add (hash, neigh);
next_packet:
		sd_lldp_packet_unref (packets[i]);
	}

	g_free (packets);

	if (lldp_hash_table_equal (priv->lldp_neighbors, hash)) {
		g_hash_table_destroy (hash);
	} else {
		g_hash_table_destroy (priv->lldp_neighbors);
		priv->lldp_neighbors = hash;
		nm_clear_g_variant (&priv->variant);
		g_object_notify (G_OBJECT (self), NM_LLDP_LISTENER_NEIGHBORS);
	}

	/* Since the processing of the neighbor list is potentially
	 * expensive when there are many neighbors, coalesce multiple
	 * events arriving in short time.
	 */
	priv->timer = g_timeout_add_seconds (MIN_UPDATE_INTERVAL, lldp_timeout, self);
	priv->num_pending_events = 0;
}

static void
lldp_event_handler (sd_lldp *lldp, int event, void *userdata)
{
	NMLldpListener *self = userdata;
	NMLldpListenerPrivate *priv;

	g_return_if_fail (NM_IS_LLDP_LISTENER (self));
	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	if (priv->timer > 0) {
		priv->num_pending_events++;
		return;
	}

	process_lldp_neighbors (self);
}

gboolean
nm_lldp_listener_start (NMLldpListener *self, int ifindex, const char *iface,
395
                        const guint8 *mac, guint mac_len, GError **error)
396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412
{
	NMLldpListenerPrivate *priv;
	int ret;

	g_return_val_if_fail (NM_IS_LLDP_LISTENER (self), FALSE);
	g_return_val_if_fail (ifindex > 0, FALSE);
	g_return_val_if_fail (iface, FALSE);
	g_return_val_if_fail (!error || !*error, FALSE);

	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	if (priv->lldp_handle) {
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "already running");
		return FALSE;
	}

413
	if (!mac || mac_len != ETH_ALEN) {
414 415 416 417 418
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "unsupported device");
		return FALSE;
	}

419
	ret = sd_lldp_new (ifindex, iface, (struct ether_addr *) mac, &priv->lldp_handle);
420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648
	if (ret) {
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "initialization failed");
		return FALSE;
	}

	ret = sd_lldp_attach_event (priv->lldp_handle, NULL, 0);
	if (ret) {
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "attach event failed");
		goto err_free;
	}

	ret = sd_lldp_set_callback (priv->lldp_handle, lldp_event_handler, self);
	if (ret) {
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "set callback failed");
		goto err;
	}

	ret = sd_lldp_start (priv->lldp_handle);
	if (ret) {
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "start failed");
		goto err;
	}

	priv->ifindex = ifindex;
	priv->iface = strdup (iface);
	return TRUE;

err:
	sd_lldp_detach_event (priv->lldp_handle);
err_free:
	sd_lldp_free (priv->lldp_handle);
	priv->lldp_handle = NULL;
	return FALSE;
}

void
nm_lldp_listener_stop (NMLldpListener *self)
{
	NMLldpListenerPrivate *priv;
	guint size;

	g_return_if_fail (NM_IS_LLDP_LISTENER (self));
	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	if (priv->lldp_handle) {
		sd_lldp_stop (priv->lldp_handle);
		sd_lldp_detach_event (priv->lldp_handle);
		sd_lldp_free (priv->lldp_handle);
		g_clear_pointer (&priv->iface, g_free);
		priv->lldp_handle = NULL;

		size = g_hash_table_size (priv->lldp_neighbors);
		g_hash_table_remove_all (priv->lldp_neighbors);
		if (size) {
			nm_clear_g_variant (&priv->variant);
			g_object_notify (G_OBJECT (self), NM_LLDP_LISTENER_NEIGHBORS);
		}
	}

	nm_clear_g_source (&priv->timer);
}

gboolean
nm_lldp_listener_is_running (NMLldpListener *self)
{
	NMLldpListenerPrivate *priv;

	g_return_val_if_fail (NM_IS_LLDP_LISTENER (self), FALSE);

	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);
	return !!priv->lldp_handle;
}

GVariant *
nm_lldp_listener_get_neighbors (NMLldpListener *self)
{
	GVariantBuilder array_builder, neigh_builder;
	GHashTableIter iter;
	NMLldpListenerPrivate *priv;
	LLDPNeighbor *neigh;
	char *dest_str = NULL;

	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	if (priv->variant)
		goto out;

	g_variant_builder_init (&array_builder, G_VARIANT_TYPE ("aa{sv}"));
	g_hash_table_iter_init (&iter, priv->lldp_neighbors);

	while (g_hash_table_iter_next (&iter, NULL, (gpointer *) &neigh)) {
		GHashTableIter val_iter;
		gpointer key, val;

		g_variant_builder_init (&neigh_builder, G_VARIANT_TYPE ("a{sv}"));

		g_variant_builder_add (&neigh_builder, "{sv}",
		                       NM_LLDP_ATTR_CHASSIS_ID_TYPE,
		                       g_variant_new_uint32 (neigh->chassis_id_type));
		g_variant_builder_add (&neigh_builder, "{sv}",
		                       NM_LLDP_ATTR_CHASSIS_ID,
		                       g_variant_new_string (neigh->chassis_id));
		g_variant_builder_add (&neigh_builder, "{sv}",
		                       NM_LLDP_ATTR_PORT_ID_TYPE,
		                       g_variant_new_uint32 (neigh->port_id_type));
		g_variant_builder_add (&neigh_builder, "{sv}",
		                       NM_LLDP_ATTR_PORT_ID,
		                       g_variant_new_string (neigh->port_id));

		switch (neigh->dest) {
		case SD_LLDP_DESTINATION_TYPE_NEAREST_BRIDGE:
			dest_str = NM_LLDP_DEST_NEAREST_BRIDGE;
			break;
		case SD_LLDP_DESTINATION_TYPE_NEAREST_NON_TPMR_BRIDGE:
			dest_str = NM_LLDP_DEST_NEAREST_NON_TPMR_BRIDGE;
			break;
		case SD_LLDP_DESTINATION_TYPE_NEAREST_CUSTOMER_BRIDGE:
			dest_str = NM_LLDP_DEST_NEAREST_CUSTOMER_BRIDGE;
			break;
		}

		if (dest_str) {
			g_variant_builder_add (&neigh_builder, "{sv}",
			                       NM_LLDP_ATTR_DESTINATION,
			                       g_variant_new_string (dest_str));
		}

		g_hash_table_iter_init (&val_iter, neigh->tlvs);
		while (g_hash_table_iter_next (&val_iter, &key, &val)) {
			GValue *item = val;

			if (G_VALUE_HOLDS_STRING (item)) {
				g_variant_builder_add (&neigh_builder, "{sv}",
				                       key,
				                       g_variant_new_string (g_value_get_string (item)));
			} else if (G_VALUE_HOLDS_UINT (item)) {
				g_variant_builder_add (&neigh_builder, "{sv}",
				                       key,
				                       g_variant_new_uint32 (g_value_get_uint (item)));
			}
		}

		g_variant_builder_add (&array_builder, "a{sv}", &neigh_builder);
	}

	priv->variant = g_variant_ref_sink (g_variant_builder_end (&array_builder));

out:
	return priv->variant;
}

static void
get_property (GObject *object, guint prop_id,
              GValue *value, GParamSpec *pspec)
{
	NMLldpListener *self = NM_LLDP_LISTENER (object);

	switch (prop_id) {
	case PROP_NEIGHBORS:
		g_value_set_variant (value, nm_lldp_listener_get_neighbors (self));
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
nm_lldp_listener_init (NMLldpListener *self)
{
	NMLldpListenerPrivate *priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	priv->lldp_neighbors = g_hash_table_new_full (lldp_neighbor_id_hash,
	                                              lldp_neighbor_id_equal,
	                                              lldp_neighbor_free, NULL);
}

NMLldpListener *
nm_lldp_listener_new (void)
{
	return (NMLldpListener *) g_object_new (NM_TYPE_LLDP_LISTENER, NULL);
}

static void
dispose (GObject *object)
{
	nm_lldp_listener_stop (NM_LLDP_LISTENER (object));

	G_OBJECT_CLASS (nm_lldp_listener_parent_class)->dispose (object);
}

static void
finalize (GObject *object)
{
	NMLldpListener *self = NM_LLDP_LISTENER (object);
	NMLldpListenerPrivate *priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	nm_lldp_listener_stop (self);
	g_hash_table_unref (priv->lldp_neighbors);

	nm_clear_g_variant (&priv->variant);

	G_OBJECT_CLASS (nm_lldp_listener_parent_class)->finalize (object);
}

static void
nm_lldp_listener_class_init (NMLldpListenerClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);

	g_type_class_add_private (klass, sizeof (NMLldpListenerPrivate));

	object_class->dispose = dispose;
	object_class->finalize = finalize;
	object_class->get_property = get_property;

	g_object_class_install_property
		(object_class, PROP_NEIGHBORS,
		 g_param_spec_variant (NM_LLDP_LISTENER_NEIGHBORS, "", "",
		                       G_VARIANT_TYPE ("aa{sv}"),
		                       NULL,
		                       G_PARAM_READABLE |
		                       G_PARAM_STATIC_STRINGS));
}